IN-111 LEUKOCYTE UPTAKE IN A PATIENT WITH OSSEOUS METASTATIC EWINGS-SARCOMA

A case of increased uptake of In-111 labeled leukocytes in osseous met astasis from Ewing's sarcoma is presented. Bone scan and MRI findings were concordant with the indium scan, and biopsy confirmed Ewing's met astasis. Although relatively specific for infection, indium infrequent ly does demonstrate abnormal bone uptake in several malignancies. This case report is the first to describe indium uptake in osseous metasta tic Ewing's sarcoma. Possible mechanisms of indium leukocyte localizat ion are discussed.